values_of_keys.js - inspect values of various Lesson object keys
values_of_keys.js - inspect values of various Lesson object keys

This inspection is necessary for our next feature, which allows filtering
of modules by lecture time.

Signed-off-by: Pang Yan Han <22594c345857f664c61cd411f607c4d40a9d4af9@gmail.com>

yanhan/cljs-nusmods,yanhan/cljs-nusmods,yanhan/cljs-nusmods